Mindscope Hyper X Friction Powered Bikes w/Anti-Gravity Track & 2 Bikes/Motorcycles Comes with 2 hyper powered friction bikes & double loop/track. Collect more and combine track to build the ultimate stunt set. Bikes perform several stunts: wheelies, inverted spins, gyro spints, 360 flips & spinning on the tip of a pen No Batteries Required Tested & Safe for 3+, Fun for 5+